books.google.com - This series introduces readers to the proper use of common punctuation marks.- - Large type; ample spacing between lines- - Easy-to-follow layout; text appears at same place on every page- - Print separated from photos- - Simple sentences- - Digraphs, consonant blends- - Long and short vowel sounds-...https://books.google.com/books/about/Comma.html?id=WFcbYaLirYsC&utm_source=gb-gplus-shareComma